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Viewing changes to drizzled/sql_select.cc

Merge in Andrew

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drizzled/sql_select.cc
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static Item* part_of_refkey(Table *form,Field *field);
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static bool cmp_buffer_with_ref(JoinTable *tab);
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static void change_cond_ref_to_const(Session *session,
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                                     vector<COND_CMP>& save_list,
 
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                                     list<COND_CMP>& save_list,
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                                     Item *and_father,
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                                     Item *cond,
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                                     Item *field,
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  and_level
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*/
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static void change_cond_ref_to_const(Session *session,
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                                     vector<COND_CMP>& save_list,
 
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                                     list<COND_CMP>& save_list,
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                                     Item *and_father,
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                                     Item *cond,
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                                     Item *field,
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}
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static void propagate_cond_constants(Session *session, 
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                                     vector<COND_CMP>& save_list, 
 
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                                     list<COND_CMP>& save_list, 
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                                     COND *and_father, 
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                                     COND *cond)
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{
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    bool and_level= ((Item_cond*) cond)->functype() == Item_func::COND_AND_FUNC;
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    List_iterator_fast<Item> li(*((Item_cond*) cond)->argument_list());
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    Item *item;
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    vector<COND_CMP> save;
 
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    list<COND_CMP> save;
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    while ((item=li++))
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    {
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      propagate_cond_constants(session, save, and_level ? cond : item, item);
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    if (and_level)
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    {
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      // Handle other found items
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      for (vector<COND_CMP>::iterator iter= save.begin(); iter != save.end(); ++iter)
 
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      for (list<COND_CMP>::iterator iter= save.begin(); iter != save.end(); ++iter)
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      {
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        Item **args= iter->cmp_func->arguments();
 
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        Item **args= iter->second->arguments();
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        if (not args[0]->const_item())
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        {
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          change_cond_ref_to_const(session, save_list, iter->and_level,
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                                   iter->and_level, args[0], args[1] );
 
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          change_cond_ref_to_const(session, save, iter->first,
 
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                                   iter->first, args[0], args[1] );
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        }
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      }
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    }
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                             &join->cond_equal);
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    /* change field = field to field = const for each found field = const */
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    vector<COND_CMP> temp;
 
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    list<COND_CMP> temp;
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    propagate_cond_constants(session, temp, conds, conds);
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    /*
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      Remove all instances of item == item